Donald Trump in quotes: The 2016 US presidency candidate's most controversial opinions and tweets

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Donald Trump: "I beat China all the time." (Source: Getty)

Donald Trump announced his intention to run for president of the United States in typical style - in the lobby of skyscraper brandishing his name and with boasts such as "I beat China all the time. All the time."

The eccentric host of the US version of The Apprentice is an outsider to win the 2016 Republican nomination, yet in a crowded field the billionaire is polling in the top 10 meaning he could well feature on televised debates and - if his past history is anything to go by - make headlines.

On Barack Obama

It's safe to say Trump isn't a fan. Indeed, after Obama's 2012 victory Trump even called for "revolution" on Twitter. The entrepreneur has teamed up with conspiracy theorists to question the validity of the president's birth certificate.